HD74HC194 查看數據表（PDF） - Hitachi -> Renesas Electronics

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产品描述 (功能)

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HD74HC194

4-bit Bidirectional Universal Shift Register

Hitachi -> Renesas Electronics 

Pin Arrangement

HD74HC194

Clear 1

Shift

Right 2

Serial-Input

A3

B4

Parallel

Inputs C 5

D6

Shift

Left 7

Serial-Input

GND 8

Timing Diagram

R CLR QA

A

QB

B

QC

C

QD

D

CK

L

S1

S0

(Top view)

16 VCC

15 QA

14 QB

Parallel

13 QC Outputs

12 QD

11 Clock

10 S1

Mode Control

9 S0

Clock

Mode S0

Control

Inputs S1

Clear

Serial

R

Data

Inputs L

AH

Parallel B L

Data

Inputs C H

DL

QA

QB

Outputs

QC

QD

Clear Load

Shift Right

Shift Left

Inhibit

Clear

3

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